I'm going to nominate this particular game. It's a tricky match, with an interesting planet layout. The AI's aren't very defensive, and the AI's behavior makes it tricky. There's a lot of options to tackle the galaxy in front of you, but you have to watch your back and don't leave yourself too open.
- Two difficulty 7 AI's, a Tag Team and Vicious Assaulter.
- Grid Type with 80 planets.
- 1 AI progress every 15 minutes.
- Ship types are complex.
- Trains are enabled, but you start in a system without train traffic.
- Fast and dangerous combat enabled (feel free to change combat type).
- Trader, Devourer, Rebel Colonies, Marauders, Mining Golem, Resistance Fighters enabled as minor factions.